R
SL SERIES
High Voltage Power Supply
MODEL :
SERIAL# :
DATE :
SPELLMAN
HIGH VOLTAGE ELECTRONICS
CORPORATION
475 Wireless Blvd.
Hauppauge, New York, 11788
+1(631) 630-3000*FAX: +1(631) 435-1620*
E-mail: sales@spellmanhv.com
Website: www.spellmanhv.com
SL SERIES MANUAL
118005-001 Rev N
IMPORTANT SAFETY PRECAUTIONS
SAFETY
THIS POWER SUPPLY GENERATES VOLTAGES THAT ARE DANGEROUS AND MAY BE FATAL.
OBSERVE EXTREME CAUTION WHEN WORKING WITH THIS EQUIPMENT.
High voltage power supplies must always be grounded.
Do not touch connections unless the equipment is off and the
Capacitance of both the load and power supply is discharged.
Allow five minutes for discharge of internal capacitance of the power supply.
Do not ground yourself or work under wet or damp conditions.
SERVICING SAFETY
.
Maintenance may require removing the instrument cover with the power on.
Servicing should be done by qualified personnel aware of the electrical hazards.
WARNING note in the text call attention to hazards in operation of these units
that could lead to possible injury or death.
CAUTION notes in the text indicate procedures to be followed to avoid possible
damage to equipment.
Copyright © 2000, Spellman High Voltage Electronics Corporation. All Rights Reserved.
This information contained in this publication is derived in part from proprietary and patent data. This information has
been prepared for the express purpose of assisting operating and maintenance personnel in the efficient use of the
model described herein, and publication of this information does not convey any right to reproduce it or to use it for
any purpose other than in connection with installation, operation, and maintenance of the equipment described.
118004-001 REV. B
WICHTIGE SICHERHEITSHINWEISE
SICHERHEIT
DIESES HOCHSPANNUNGSNETZTEIL ERZEUGT LEBENSGEFÄHRLICHE HOCHSPANNUNG.
SEIN SIE SEHR VORSICHTIG BEI DER ARBEIT MIT DIESEM GERÄT.
Das Hochspannungsnetzteil muß immer geerdet sein.
Berühren Sie die Stecker des Netzteiles nur, wenn das Gerät ausgeschaltet ist und die elektrischen
Kapazitäten des Netzteiles und der angeschlossenen Last entladen sind.
Die internen Kapazitäten des Hochspannungsnetzteiles benötigen ca. 5 Minuten, um sich zu entladen.
Erden Sie sich nicht, und arbeiten Sie nicht in feuchter oder nasser Umgebung.
SERVICESICHERHEIT
Notwendige Reparaturen können es erforderlich machen, den Gehäusedeckel während des Betriebes zu
entfernen.
Reparaturen dürfen nur von qualifiziertem, eingewiesenem Personal ausgeführt werden.
“WARNING” im folgenden Text weist auf gefährliche Operationen hin, die zu Verletzungen oder zum Tod
führen können.
“CAUTION” im folgenden Text weist auf Prozeduren hin, die genauestens befolgt werden müssen, um
eventuelle Beschädigungen des Gerätes zu vermeiden.
118004-001 REV. B
PRECAUTIONS IMPORTANTES POUR VOTRE SECURITE
CONSIGNES DE SÉCURITÉ
CETTE ALIMENTATION GÉNÈRE DES TENSIONS QUI SONT DANGEUREUSES ET PEUVENT ÊTRE FATALES.
SOYEZ EXTRÊMENT VIGILANTS LORSQUE VOUS UTILISEZ CET ÉQUIPEMENT.
Les alimentations haute tension doivent toujours être mises à la masse.
Ne touchez pas les connectiques sans que l’équipement soit éteint et que la capacité à la fois de la charge et de
l’alimentation soient déchargées.
Prévoyez 5 minutes pour la décharge de la capacité interne de l’alimentation.
Ne vous mettez pas à la masse, ou ne travaillez pas sous conditions mouillées ou humides.
CONSIGNES DE SÉCURITÉ EN CAS DE REPARATION
La maintenance peut nécessiter l’enlèvement du couvercle lorsque l’alimentation est encore allumée.
Les réparations doivent être effectuées par une personne qualifiée et connaissant les risques électriques.
Dans le manuel, les notes marquées « WARNING » attire l’attention sur les risques lors de la manipulation de ces
équipements, qui peuvent entrainer de possibles blessures voire la mort.
Dans le manuel, les notes marquées « CAUTION » indiquent les procédures qui doivent être suivies afin d’éviter
d’éventuels dommages sur l’équipement.
118004-001 REV. B
IMPORTANTI PRECAUZIONI DI SICUREZZA
SICUREZZA
QUESTO ALIMENTATORE GENERA TENSIONI CHE SONO PERICOLOSE E
POTREBBERO ESSERE MORTALI.
PONI ESTREMA CAUTELA QUANDO OPERI CON QUESO APPARECCHIO.
Gli alimentatori ad alta tensione devono sempre essere collegati ad un impianto di terra.
Non toccare le connessioni a meno che l’apparecchio sia stato spento e la capacità interna
del carico e dell’alimentatore stesso siano scariche.
Attendere cinque minuti per permettere la scarica della capacità interna dell’alimentatore
ad alta tensione.
Non mettere a terra il proprio corpo oppure operare in ambienti bagnati o saturi d’umidità.
SICUREZZA NELLA MANUTENZIONE.
Manutenzione potrebbe essere richiesta, rimuovendo la copertura con apparecchio
acceso.
La manutenzione deve essere svolta da personale qualificato, coscio dei rischi elettrici.
Attenzione alle AVVERTENZE contenute nel manuale, che richiamano all’attenzione ai
rischi quando si opera con tali unità e che potrebbero causare possibili ferite o morte.
Le note di CAUTELA contenute nel manuale, indicano le procedure da seguire per evitare
possibili danni all’apparecchio.
118004-001 REV. B
Table of Contents
PAGE
1. INTRODUCTION
1.1
Description of the SL Series ................................................................................1
1.2
Standard Features.................................................................................................2
1.2.1
Remote Operating Features ..................................................................2
1.2.2
System Status and Fault Diagnostic Display ........................................2
1.3
Options.................................................................................................................3
1.4
Interpreting the Model Number ...........................................................................4
2. INSPECTION & INSTALLATION
2.1
Initial Inspection ..................................................................................................5
2.2
Mechanical Installation........................................................................................5
3. OPERATING INSTRUCTIONS
3.1
Operation .............................................................................................................7
3.2
Standard Features.................................................................................................8
4. PRINCIPLES OF OPERATION
4.1
Chassis .................................................................................................................18
4.2
Line Rectification and Filtering...........................................................................18
4.3
Inverter.................................................................................................................19
4.4
High Voltage Transformer...................................................................................20
4.5
High Voltage Assembly.......................................................................................20
4.6
Control/Power PWB ............................................................................................20
4.7
Front Panel Assembly ..........................................................................................20
4.8
Options.................................................................................................................20
5. OPTIONS
5.1
Adjustable Overload Trip ....................................................................................21
5.2
220Vac Single Phase Input .................................................................................21
5.3
No Slow Start ......................................................................................................21
5.4
Non-Standard Slow Start .....................................................................................21
5.5
Extra Length Output Cable ..................................................................................21
5.6
Floating Ground ...................................................................................................21
5.7
Floating Ground Low Leakage ............................................................................22
5.8
Adjustable Power Trip/Constant Power Control .................................................22
SL SERIES MANUAL
I
118006-001 REV V
5.9
Arc Trip Option ...................................................................................................22
5.10 Reversible Polarity Option...................................................................................22
5.10.1
Models from 1 kV to 8kV .........................................................................22
5.10.2
Models from 10kV to 130kV ....................................................................22
5.11 Instant On.............................................................................................................22
5.12 Bipolar Master/Slave Option ...............................................................................23
5.13 External Fault Relay Option ................................................................................23
5.14 Custom Design Models........................................................................................23
6. MAINTENANCE
6.1
Periodic Servicing................................................................................................28
6.2
Performance Test .................................................................................................28
6.3
High Voltage Dividers .........................................................................................28
7. REPLACEMENT PARTS
7.1 Replacement Parts................................................................................................29
7.2 Correspondence and Ordering Spare Parts ..........................................................29
8. FACTORY SERVICE
8.1 Warranty Repairs .................................................................................................30
8.2 Factory Service Procedures .................................................................................30
8.3 Ordering Options and Modifications ...................................................................30
8.4 Shipping Instructions ...........................................................................................30
SL SERIES MANUAL
II
118006-001 REV V
LIST OF FIGURES
Figure 2.1
Figure 3.1
Figure 3.2A
Figure 3.2B
Figure 3.3
Figure 3.4
Figure 3.5
Figure 3.6
Figure 3.7
Figure 3.8
Figure 5.1
Figure 5.2
Figure 5.3
Figure 5.4
Figure 5.5
Figure 5.6
Figure 5.7
Figure 5.8
SL Series Dimensions .................................................................................6
SL Series Typical Operating Set Up...........................................................10
Wiring Diagram for Remote Programming via Voltage Source ................13
Wiring Diagram for Remote Programming via External Resistance..........13
Remote Monitor Test Point Designations...................................................14
Remote Control of High Voltage On and Off ............................................14
External Inhibit Interface Circuit................................................................15
External Interlock Interface Circuit ............................................................15
Remote High Voltage On and Remote High Voltage off Indicator Circuit.... 16
Remote Indicators Interface ............................................................................ 17
Floating Ground Interface Circuit................................................................... 24
Adjustable Power Remote Interface TB1 Only .............................................. 24
Polarity Reversal Procedure 1kV to 8kV (10W to 300W).............................. 25
Polarity Reversal Procedures, 10kV to 130kV (10W to 300W) ..................... 25
Polarity Reversal Procedures, 1kV to 8kV (600W to 1200W) ....................... 26
Polarity Reversal Procedures 10kV to 130kV (600W to 1200W) .................. 26
Instant On Option............................................................................................ 27
Bipolar Master/Slave Option ......................................................................27
LIST OF TABLES
Table 1.1
Table 3.1
Table 3.2
Table 4.1
SL Options ..................................................................................................3
Rear Panel Interface 26 pin Terminal Block ..............................................11
Rear Panel Interface 25 pin Mini D ............................................................12
List of Main Assemblies .............................................................................19
APPENDIX
A.
SL SERIES MANUAL
Specification Controls (Custom Models Only)
III
118006-001 REV V
Chapter 1
INTRODUCTION
1.1 Description of the SL Series
T
he SL Series of high voltage power supplies provides
very well regulated, low ripple high voltage in a
highly efficient, compact design. The improvements
in size and performance over traditionally designed high
voltage power supplies are due to the resonant topology
and unique control circuitry of the SL design. A
proprietary control system maintains high frequency over
the operating output range. High frequency operation
allows a dynamic response time of less than 5
milliseconds, and one of the lowest ripple specifications
in the industry at this power level. The combination of
proprietary control system and proprietary protection
circuitry enables the supplies to operate under arcing and
extreme transient conditions without damage or
interruptions.
The DC output voltage and current are continuously
adjustable from zero to the maximum rating via two front
panel ten-turn locking potentiometers.
These high
voltage power supplies have 0.005% load regulation,
0.005% line regulation, and 0.1% p-p ripple.
The supplies operate from either a 115 or 220 Volt, single
phase AC line. Other line voltages are available. Options
are listed in Table 1.1 and are described in Section 5.
Custom designed units to meet special needs are also
available.
SL SERIES MANUAL
1
118006-001 REV V
1.2 Standard Features
The SL Series incorporates several standard features
designed to optimize user satisfaction and safety.



SLOW START: This feature provides a gradual
increase in high voltage until the preset operating
point is reached. The slow start time is factory set
for 6 seconds. Other slow start times are available as
an option.
ARC DETECT / ARC QUENCH / ARC COUNT:
These features allow the user to tailor the power
supply to meet specific needs in dynamic load
applications. If an arc occurs, the output is inhibited
for approximately one second, then the output is
ramped up to the preset level with the slow-start
circuitry. See Chapter 3 for operating details and
information for user customization of these features.
INDICATOR LAMPS: LINE POWER, HIGH
VOLTAGE OFF AND HIGH VOLTAGE ON
indicators.

OUTPUT CABLE: All models are provided with a
ten foot shielded high voltage output cable. The
cables are designed with a plug arrangement so that
they can be easily removed from the mating
receptacle located on the rear of the chassis.


EXTERNAL INHIBIT: A control signal that will
inhibit the high voltage output is provided on the
external interface. A logic low, ground, will inhibit
the high voltage output and a logic high, open, will
restore the high voltage output to the preset level.

“Dead Front” type indictors are provided to give the user
complete indication of system operation and fault
conditions. If a fault occurs, the power supply will revert
to the POWER DOWN mode. This is indicated by both
the HV ON and HV OFF lamps turning off. To reset,
depress the HV OFF switch.
REMOTE PROGRAMMING:
Allows remote
adjustment of the output voltage and current via an
external voltage source. The output power is also
remotely controllable when the CPC or APT option
is ordered, TB1 only.

VOLTAGE (CONTROL): Indicates the output
voltage regulator circuit is maintaining voltage
regulation.

CURRENT (CONTROL): Indicates the output
current regulator circuit is maintaining current
regulation.

POWER (CONTROL): Indicates the output power
regulator circuit is maintaining power regulation
(optional).

HV INHIBIT: Indicates that the high voltage
supply is being inhibited by either the EXTERNAL
INHIBIT or internal protection circuitry.

INTLK CLSD:
Indicates the EXTERNAL
INTERLOCK connections are in the closed position.
This also indicates closure of internal power supply
interlocks.
REMOTE MONITOR: Allows remote monitoring
of the output voltage and current.
NOTE: Output power remote monitor is included with
the CPC and APT options, TB1 only.
SL SERIES MANUAL
EXTERNAL INTERLOCK: Interlock connections
are provided on the external interface on the rear of
the chassis for connection to a safety switch. The
unit will not operate unless the interlock circuit is
closed. During high voltage operation, opening the
interlock circuit will cause the High Voltage to shut
off. This circuit should be used for safety interlock
circuits.
1.2.2 System Status and Fault
Diagnostic Display
1.2.1 Remote Operating Features

REMOTE HIGH VOLTAGE CONTROL:
Allows remote control of HIGH VOLTAGE ON and
HIGH VOLTAGE OFF. Signals are also provided
for remote indication of HV ON or HV OFF status.
NOTE: The External Inhibit circuit should NOT be used
for protection against injury or for safety interlock.
See External Interlock for this type of safety control.
INTERNAL FAULT PROTECTION: The SL
Series continually monitors internal circuits critical to
the proper operation of the power supply. In the
event that one of these circuits does not function
correctly, the fault detection circuit latches the
appropriate fault on the front panel display and turns
off the output and reverts the unit to the POWER
DOWN mode.


2
118006-001 REV V




INTKL OPEN:
Indicates the EXTERNAL
INTERLOCK connections are in the open position.
This also indicates opening of internal power supply
interlocks.
1.3 Options
OVERVOLT: Indicates the overvoltage protection
circuitry has caused the power supply to turn off.
Overvoltage protection is internally set to 110% of
the rated output voltage.
OVERCURR: Indicates the output current has
exceeded the programmed current trip level when the
AOL (Adjustable Overload Trip) or the OL
(Overload Trip) options are installed.
OVERPOWER: Indicates the output power has
exceeded the internally set level or the remote
programmed level if the optional circuitry is
installed.

ARC: Indicates that an arc has occurred within the
previous one second or that the ARC COUNT/TRIP
has shutdown the power supply.

RGLT ERR: Indicates a failure in the voltage,
current or power regulation circuitry. This fault
usually occurs when there is a lack of output power
to maintain regulation.
The options available are listed in Table 1.1. See Section
5 for more information on these options along with
operating and set-up instructions. With few exceptions,
these options and modifications can be retrofitted to your
power supply at the factory in a short time. For price and
retrofit arrangements, contact the Spellman Sales
Department.
AOL
Adjustable Overload Trip (0-103%)
OL
Overload Trip (103%)
APT
Adjustable Power Trip
AT
Arc Trip
FG
Floating Ground
FGLL
Floating Ground, Low Leakage (10mA)
CPC
Constant Power Control
SS(x)
Non-Standard Slow Start
NSS
No Slow Start
IO
Instant ON
LR
Low Ripple (0.05% p-p)
( )
DPM4
Specify 220V or 100V or 200Vac Single Phase
Input With Order.
4 1/2 Digit  1 Least Significant Digit Panel Mtr
PN
Reversible Polarity
FPS
Filament Power Supply
LL (x)
Extra Length Output Cable in Feet
MS
Bipolar Master/Slave
C
3 1/2” High (2U) Cabinet For Multiple Units
SL
Slides
EFR
External Fault Relay
BFP
Blank Front Panel
Table 1.1 SL Options
SL SERIES MANUAL
3
118006-001 REV V
1.4 Interpreting the Model Number
The model number of the power supply describes its
capabilities. After the series name is:
1.
2.
3.
4.
the maximum voltage (in KV).
the polarity of the unit: positive (P), negative (N) or
reversible (PN).
the maximum output (in watts).
the option codes for all options that are included.
Custom units have an X number after the option codes.
SL
Series
Name
Maximum
Voltage
SL SERIES MANUAL
30
P
1200
/ FG /
X (#)
Option
Polarity
Maximum
Power
4
Custom
“X”
Number
118006-001 REV V
Chapter 2
INSPECTION & INSTALLATION
I
nitial inspection and preliminary checkout procedures
are recommended. For safe operation, please follow
the step-by-step procedures described in Chapter 3,
Operating Systems.
Fill out and mail the Warranty Registration card
accompanying the unit. Standard Spellman SL Series
high voltage power supplies and components are covered
by warranty. Custom and special order models (with an
X suffix and the model number) are also covered by
warranty.
2.1 Initial Inspection
Inspect the package exterior for evidence of damage due
to handling in transit. Notify the carrier and Spellman
immediately if damage is evident. Do not destroy or
remove any of the packing material used in a damaged
shipment.
2.2 Mechanical Installation
Units in the SL Series have front panel holes for standard
EIA rack mounting. The rack must allow rear access for
cable connections. Units are fully enclosed and are
suitable for bench or table top operation. Standard unit
dimensions are shown in Figure 2.1.
It is strongly
recommended to support the chassis by guides or slides.
Slides are available for ease of servicing (SL option).
After unpacking, inspect the panel and chassis for visible
damage.
SL SERIES MANUAL
5
118006-001 REV V
19.00 [482.60]
18.31 [465.14]
0.34 [8.73]
0.25 [6.35]
TYP
90
90
10
80
20
80
30
70
30
70
40
VOLTAGE OVER VOLT
CURRENT OVER CURR
POWER OVER PWR
0
0
10
20
60
40
50
milliamperes
17.00 [431.83]
IEC 320
INPUT CONNECTOR
HV
ON
INTLK CLSD RGLT ERR
INTLK OPEN
ARC
60
50
kilovolts
SPELLMAN
I
O
1
HV
OFF
HV INHIBIT OVER TEMP
HIGH VOLTAGE
OUTPUT CONNECTOR
HIGH VOLTAGE
TB1-I/O INTERFACE
1.72 [43.66]
2
3
4
5
6
7
8
9
TB2
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
J2
LINE INPUT
J1
PART NO.
MODEL:
SERIAL NO:
OUTPUT:
INPUT:
0.23 [5.97]
FRONT PANEL
REAR PANEL
25 PIN MINI "D"
2 PIN TERMINAL BLOCK
LOAD RETURN
(CHASSIS GROUND)
26 PIN TERMINAL BLOCK
FOR REMOTE CONTROL
MONITORING
REAR PANEL 25 PIN MINI "D"
10-300W
0.38 [9.52]
4 PLACES
0.25 [6.35]
4 PLACES
90
90
10
80
20
80
70
30
70
60
40
VOLTAGE OVER VOLT
0
0
10
20
30
3.45 [87.60]
60
40
CURRENT OVER CURR
POWER
OVER PWR
INTLK CLSD RGLT ERR
50
50
milliamperes
kilovolts
INTLK OPEN
ARC
HV INHIBIT OVER TEMP
HV
ON
HV
OFF
DANGER
HIGH VOLTAGE
TB1-I/O INTERFACE
O
I
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
3.00 [76.20] TYP
LINE INPUT
SPELLMAN
TB2
1
HIGH VOLTAGE ELECTRONICS CORP
PLAINVIEW, NY 11803
MADE IN USA
2
1-FLOATING GND
(OPTIONAL)
SPELLMAN
2-GND
FRONT PANEL
0.23 [5.72]
TYP
PART NO.
MODEL:
SERIAL NO:
OUTPUT:
INPUT:
REAR PANEL
14AWG LINE CODE
26 pin TB1
25 PIN MINI "D"
JB1
I/O INTERFACE
DANGER
HIGH VOLTAGE
LINE INPUT
SPELLMAN
TB2
1
HIGH VOLTAGE ELECTRONICS CORP
PLAINVIEW, NY 11803
MADE IN USA
2
1-FLOATING GND
(OPTIONAL)
2-GND
PART NO.
MODEL:
SERIAL NO:
OUTPUT:
INPUT:
600-1200W
"L"
1.66 [42.13]
SIDE VIEW OF
10-300W
OUTPUT VOLTAGE
"KV"
"L"
1 TO 70
19.00
80 TO 130
24.00
3.41 [86.59]
SIDE VIEW OF
600-1200W
Figure 2.1 - SL Dimension
SL SERIES MANUAL
6
118006-001 REV V
Chapter 3
OPERATING INSTRUCTIONS
10W-300W units are provided with IEC type line
cable. 600W-1200W units are provided with a three
conductor line cord.
3.1 Operation
WARNING
D) Attach the output cable to the load.
THIS EQUIPMENT GENERATES DANGEROUS
VOLTAGES THAT MAY BE FATAL.
E) Plug the high-voltage output cable provided with the
unit into the rear of the supply and hand tighten the
knurled collar.
PROPER GROUNDING OF ALL HIGH VOLTAGE
EQUIPMENT IS ESSENTIAL.
F) OPTIONS NOTE: See Section 5 for hook-up and
operating instructions for the options on your unit.
Custom models may also require set-up changes.
WARNING
BEFORE CONNECTING THE POWER SUPPLY
TO THE AC LINE, FOLLOW THIS STEP BY STEP
PROCEDURE.
G) For initial turn-on, rotate the KILOVOLT control
fully counter-clockwise to the zero voltage position.
H) The input power cable may now be connected to the
AC power line.
DO NOT CONNECT THE POWER SUPPLY TO
THE AC LINE UNTIL STEP H IS REACHED.
I)
Failure to follow these procedures may void the warranty.
A) Insure that the Circuit Breaker is in the OFF position
(0).
B) Check the input voltage rating on the nameplate of
the supply and make certain that this is the rating of
the available power source. Spellman SL Series units
operate on 115Vac (220Vac if 220Vac option is
ordered), single phase unless ordered with a different
input voltage.
Switch the front panel circuit breaker to the ON
position (1). (If the supply is to be turned off for an
extensive period of time, the line cord should be
disconnected). The light inside the circuit breaker
should light up. The unit is now in the HIGH
VOLTAGE OFF mode. The HIGH VOLTAGE OFF
light should be lit.
C) PROPER GROUNDING TECHNIQUES: The
chassis of high voltage power supplies must be
grounded, preferably to a water system ground using
copper pipe or other earth ground using the ground
stud B1 at the rear of the unit. See Figure 3.1 for a
typical operating set-up.
The return line from the load should be connected to
the ground pin terminal block TB2-1, on the rear of
the power supply. Using a separate external ground
at the load is not recommended.
SL SERIES MANUAL
7
118006-001 REV V
CAUTION
J)
Depress and hold the HIGH VOLTAGE OFF switch.
The front panel meters will now read the preset value
of the KILOVOLT control dial and the
MILLIAMPERES control dial. To preset the desired
level of current and voltage during operation, hold in
the HIGH VOLTAGE OFF switch and rotate the
appropriate control dial while noting its
corresponding meter reading. Release the HIGH
VOLTAGE OFF switch.
ALWAYS OPERATE THE UNIT WITH THE COVER
ON.
A fan maintains safe operating temperature in 600W1200W power supplies by drawing air over the circuit
components. The cover must be on in order to direct the
air flow over the areas that need cooling. In operation,
the unit must be placed so that the air intake and the fan
exhaust are clear of obstructions that might impede the
flow of air. The 10W-300W units do not use forced air
cooling.
Simply maintain ambient temperature
specifications.
NOTE: No actual output is being produced at this stage.
K) Depress the HIGH VOLTAGE ON switch. The light
inside the switch should light up and the output will
slow start to the preset level output voltage and/or
output current.
3.2 Standard Features
A note on remote interface circuitry and remote signal
grounding. Whenever possible, electrical isolation should
be provided when interfacing with any high voltage
power supply. For power control signals such as
EXTERNAL INTERLOCK, HIGH VOLTAGE OFF,
AND HIGH VOLTAGE ON, isolated relay contacts
should be used. For status signals and control signals
such as HIGH VOLTAGE ON, HIGH VOLTAGE OFF,
and EXTERNAL INHIBIT, etc., opto-isolation should be
used. If possible, analog programming and monitoring
signals should be isolated via analog isolation amplifiers.
Spellman application engineers are available to assist in
interface circuitry design. All interface cables should be
properly shielded. All power supply signals should be
referenced to the power supplies signal ground on the rea
external interface.
NOTE: The SL Series is equipped with a slow start
circuit that ramps the output up to its maximum
setting in approximately 6 seconds after the HIGH
VOLTAGE ON switch is depressed.
L) To terminate the generation of output power, depress
the HIGH VOLTAGE OFF switch. In the HIGH
VOLTAGE OFF mode the power supply’s fault and
interface circuits are still active.
M) To turn off the power supply, turn the circuit breaker
to the off position (0).
NOTE:
If a power supply fault, or system
monitoring fault occurs, the power supply will revert
to the POWER DOWN mode. In this mode the
output power will be turned off. The HV OFF lamp
will be off. To reset, depress the HV OFF switch.

WARNING
AFTER TURNOFF, DO NOT HANDLE THE LOAD
UNTIL THE CAPACITANCE HAS BEEN
DISCHARGED!
LOAD CAPACITANCE MAY BE DISCHARGED BY
SHORTING TO GROUND.
REMOTE PROGRAMMING:
Allows remote
adjustment of the output voltage and current via an
external voltage source. (Output power is also
remotely controllable with the CPC and APT
options). In local control (front panel control),
jumpers are installed on the external interface TB1
(or J5) in the rear of the chassis between TB-10 (J510) and TB1-11 (J5-11) for voltage control and
between TB1-8 (J5-8) and TB1-9 (J5-9) for current
control.
For remote programming, the jumpers are removed and a
positive voltage source, from 0V to 10V, is applied to the
appropriate terminals. Programming signals should be
referenced to TB1-1 (J5-1), signal ground. By adjusting
the voltage source from 0V (zero output) to 10V (full
rated output), the desired output can be selected. See
Figure 3.2A on page 13 for the wiring diagram and
specifications.
WARNING
THE VOLTMETER ON THE POWER SUPPLY
FRONT PANEL DOES NOT READ THE OUTPUT
VOLTAGE WHEN THE POWER IS TURNED OFF,
EVEN IF A CHARGE STILL
EXISTS ON THE LOAD.
An alternate method of controlling the output remotely is
by using external resistance, such as a potentiometer or a
SL SERIES MANUAL
8
118006-001 REV V
resistor network. For remote control the jumpers are
removed and the desired register configuration installed.
See Figure 3.2B on page 13 for the wiring diagram.

REMOTE MONITOR: Test points are made
available at the terminal block on the rear of the
chassis for monitoring the voltage and current output.
(Output power monitor is included with the CPC and
APT option). The test points are always positive
regardless of the output polarity where 0V to 10V
equals 0 to 100% of the output 0.5%. Test points
have an output impedance of 5K ohms. See Figure
3.3 on page 14 for the test point designation.

REMOTE CONTROL: Remote control of the
HIGH VOLTAGE ON and HIGH VOLTAGE OFF
can be accomplished via the rear panel interface.
HIGH VOLTAGE OFF and HIGH VOLTAGE ON
can be controlled by momentary normally closed and
normally open contacts respectively. See Figure 3.4
on page 14 for the recommended interface.

EXTERNAL INHIBIT: Allows the user to inhibit
the power supply output without switching HIGH
VOLTAGE OFF control. This circuit can be used to
generate fast slewing output waveforms or control of
high voltage generation as in Laser and Capacitor
discharge applications. The maximum inhibit rate
should not exceed 5Hz. Consult the factory for
higher repetition rates or high pulse load
applications.
See Figure 3.5 on 15 for the
recommended interface circuit.
the interlock circuit is closed. If the interlock is not
being used, the jumper installed on the terminals
before shipping must be in place. If the jumper is
missing, or there is an opening between the interlock
terminals, the unit’s high voltage inverter will be
disabled. During high voltage operation, revert to the
HIGH VOLTAGE OFF mode. Subsequent closing
of the interlock circuit will NOT return the unit to the
HIGH VOLTAGE ON mode. This must be
accomplished by depressing the HIGH VOLTAGE
ON switch. See Figure 3.6 on page 15 for the
recommended interface circuit

The ARC COUNT feature will allow the user to program
the ARC fault parameters. The ARC indicator on the
front panel will illuminate for approximately one second
after each arc has occurred. The power supply can be
programmed to trip the POWER DOWN mode if an arc
occurs.
WARNING
The standard feature is programmed to trip the power
supply if 8 arcs occur within a twenty second period.
IT IS EXTREMELY DANGEROUS TO USE THIS
INHIBIT CIRCUIT TO INHIBIT HIGH VOLTAGE
GENERATION FOR THE PURPOSE OF
SERVICING OR APPROACHING ANY AREA
OR LOAD CONSIDERED UNSAFE
DURING NORMAL USE.

EXTERNAL INTERLOCK: Interlock connections
are provided on the terminal block TB1-3 (J5-3) and
TB1-4 (J5-4) on the rear of the chassis for connection
to a safety switch. The unit will not operate unless
SL SERIES MANUAL
ARC DETECT / ARC QUENCH / ARC COUNT:
The ARC DETECT circuit senses dynamic arcing or
discharge conditions present at the output load. If an
arc occurs, the output is inhibited for one second.
After the one second period, the output is ramped up
to the previous set level. This ramp is based on the
standard six second slow start feature. The ARC
DETECT ramp circuit may be disabled by removing
CR32 on the Control/Power Pwb. Caution should be
observed if this feature is disabled. Discharge rates
of greater then 1Hz may cause excessive power
dissipation in the power supply’s output limiting
resistors.
9

REMOTE HIGH VOLTAGE ON & REMOTE
HIGH VOLTAGE OFF: Signals are provided for
remote monitoring of the HIGH VOLTAGE
ON/OFF status. See Figure 3.7 on page 16 for
recommended interface.

REMOTE MODE INDICATORS: Signals are
provided for remote indication of the control mode
status, voltage control, current control, and power
control. See Figure 3.8 on page 17 for the
recommended interface.
118006-001 REV V
It is recommended to connect the load return
directly to Pin 1 of TB2 terminal block located
on the rear of the high voltage power supply.
Load Return
18AWG.
Customer Supplied
High Voltage Output
1 2
TB1-I/O INTERFACE
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
For Remote
Control Monitoring
Input:
115Vac or 220Vac +/-10%
50/60 Hz, Specified
at time of order
TB2
High
Voltage
Load
System Ground Cable
Shielded High Voltage
Output Cable Provided
Figure 3.1 -- Typical Operating Setup
NOTE:
On standard units, TB2-1,-2 are connected to chassis ground internally.
SL SERIES MANUAL
10
118006-001 REV V
TB1
SIGNAL
SIGNAL PARAMETERS
1
Power Supply Common
Signal Ground
2
External Inhibit
Ground = Inhibit, Open = HV ON
3
External Interlock
+15V at Open, <15mA at Closed
4
External Interlock Return
Return For Interlock
5
Current Monitor
0 to 10V = 0 to 100% Rated Output
6
kV Test Point
0 to 10V = 0 to 100% Rated Output
7
+10V Reference
+10.24V, 1mA Max
8
Remote Current Program In
0 to 10V = 0 to 100% Rated Output
9
Local Current Program Out
Front Panel Program Voltage
10
Remote Voltage Program In
0 to 10V = 0 to 100% Rated Output
11
Local Voltage Program Out
Front Panel Program Voltage
12
Power Monitor (TB1 only)
0 to 10V = 0 to 100% Rated Power (Optional)
13
Remote Power Program In (TB1
only)
14
Local HV OFF Out
+15V at Open, < 25mA at Closed.
Connect to HV OFF For FP Operation
15
HV OFF
16
Remote HV ON
+15V, 10mA Max = HV ON
17
Remote HV OFF Indicator
0 = HV ON, +15V, 10mA Max = HV OFF
18
Remote HV ON Indicator
0 = HV OFF, +15V, 10mA Max = HV ON
19
Remote Voltage Mode
20
Remote Current Mode
21
Remote Power Mode
22
Remote PS Fault
0 = Fault, +15V, 0.1 mA Max = No Fault
23
+15V Output
+15V, 100mA Max
24
Power Supply Common
Signal Ground
25
Spare
Spare
26
Shield Return
Chassis Ground
Open Collector 50V Max, 10mA Max On = Active
Table 3.1 - Rear Panel Interface 26 pin TB1
SL SERIES MANUAL
11
118006-001 REV V
J5
SIGNAL
SIGNAL PARAMETERS
1
Power Supply Common
Signal Ground
2
External Inhibit
Ground = Inhibit, Open = HV ON
3
External Interlock
+15V at Open, <15mA at Closed
4
External Interlock Return
Return For Interlock
5
Current Monitor
0 to 10V = 0 to 100% Rated Output
6
kV Test Point
0 to 10V = 0 to 100% Rated Output
7
+10V Reference
+10.24V, 1mA Max
8
Remote Current Program In
0 to 10V = 0 to 100% Rated Output
9
Local Current Program Out
Front Panel Program Voltage
10
Remote Voltage Program In
0 to 10V = 0 to 100% Rated Output
11
Local Voltage Program Out
Front Panel Program Voltage
12
EFR (Common)
Optional External Fault Relay
13
EFR (Normally Open)
14
Local HV Off Out
+15V at Open, < 25mA at Closed.
Connect to HV OFF For FP Operation
15
HV OFF
16
Remote HV ON
+15V, 10mA Max = HV ON
17
Remote HV OFF Indicator
0 = HV ON, +15V, 10mA Max = HV OFF
18
Remote HV ON Indicator
0 = HV OFF, +15V, 10mA Max = HV ON
19
Remote Voltage Mode
20
Remote Current Mode
21
Remote Power Mode
22
Remote PS Fault
0 = Fault, +15V, 0.1 Ma Max = No Fault
23
+15V Output
+15V, 100mA Max
24
Power Supply Common
Signal Ground
25
Shield Return
Chassis Ground
Open Collector 50V Max, 10mA Max On = Active
Table 3.2 - Rear Panel Interface 25 pin Mini D
SL SERIES MANUAL
12
118006-001 REV V
Voltage Source 0-10V = 0-100% of Rated Output
It is recommended that analog signals be isolated
TB1/J5
via isolation amplifiers.
1
All cables should be shielded with the shields
being returned to the chassis ground of the
High Voltage Power Supply.
2
PS Common
3
4
5
V
6
Remote
Current
Program
+
7
8
Remove jumpers for
remote programing
Remote
Voltage
Program
V
+
Z in = 10M
9
10
Z in = 10M
11
Figure 3.2A -- Wiring Diagram for Remote Programming Via Voltage
TB1/J5
Fully Counterclockwise = Zero Output
Fully Clockwise = 100% of Rated Output
1
All cables should be shielded with the shields
2
being returned to the chassis ground of the
High Voltage Power Supply.
If connections to external potentiometers are
excessively long (>10ft), motorized
potentiometers are recommended.
Remote
Voltage
Control
3
4
5
7
8
Remote
Current
Control
20k 
6
Remove jumpers for
remote programing
20k 
PS Common
CW
CW
+10.32V
1mA max.
Z in = 10M 
9
10
Z in = 10M 
11
Figure 3.2B -- Wiring Diagram for Remote Programming Via External
SL SERIES MANUAL
13
118006-001 REV V
It is recommended that analog signals be isolated via
isolation amplifiers. All cables should be shielded
with the shield being returned to the chassis ground
of the high voltage power supply.
TB1/J5
1
PS Common
2
M
3
4
Current
Monitor
M
+
+
5
Z out = 4.99k ohms
6
Voltage
Monitor
+/-0.1%
Z out = 4.99k ohms +/-0.1%
7
Figure 3.3 -- Remote Monitor Test Point Designations
S1 must be closed to enable HIGH VOLTAGE.
Momentary closure of S2 will enable HIGH
VOLTAGE ON.
Opening S1 will disable HIGH VOLTAGE ON and
switch the unit to the HIGH VOLTAGE OFF mode.
It is recommended to use relay contacts
for S1 and S2. Relays should be located
as close as possible to the high voltage
power supply. Coils should be driven
from isolated sources. Signals are at
15Vdc, 25mA max., and are only to be
used for contact closure.
TB 1/J5
S1
S1 = Remote High
Voltage Off
14
Remove jumper for remote
high voltage control
15
S2
All cables should be shielded
with the shields being returned
to the chassis ground of the
High Voltage Power Supply.
S2 = Remote High
Voltage On
16
17
Figure 3.4 Remote Control Of High Voltage On and High Voltage Off
Interface
SL SERIES MANUAL
14
118006-001 REV V
The transistor should be located as close as possible
to the power supply
All cables should be shielded with the shields
being returned to the chassis ground of the
High Voltage Power Supply.
TB1/J5
+15V
1
Transistor
ON
Inhibits
High
Voltage
PS Common
2
2.2k
3
High Voltage Power
Supply Internal inhibit circuitry.
4
Figure 3.5 -- External Inhibit Interface Circuit
Relay contacts are recommended for S1. The relay
should be located as close as possible to the power supply.
Signals are at 15Vdc, 25mA max and are only to be used
for contact closure.
TB1/J5
1
External Safety
Interlock Control
2
Remove jumper
for remote
external interlock
3
S1
4
S1 Open = Interlock Open
S1 Closed = Interlock Closed
5
All cables should be shielded with the shields being returned
to the chassis ground of the High Voltage Power Supply.
Figure 3.6 -- External Interlock Interface
SL SERIES MANUAL
15
118006-001 REV V
12Vdc lamps or relay coils may replace opto-couplers.
Opto-couplers, lamps or relays should be located as close
as possible to the high voltage power supply.
All cables should be shielded with the shields being
d to the chassis ground of the High Voltage Power Supply.
returned
TB1/J5
1
PS Common
2
3
General Purpose
Opto-Coupler
4
5
To High Voltage
OFF Indicator
6
7
8
General Purpose
Opto-Coupler
9
To High
Voltage
ON
Indicator
10
11
12
13
14
P/O High Voltage
Power Supply

1/4 W
15
16
R Limit
17
R Limit

1/4 W
18
Signals are ~ 15Vdc, 10mA max.
R Limit must be > 500
Figure 3.7 -- Remote High Voltage On and Remote
High Voltage Off Indicator
SL SERIES MANUAL
16
118006-001 REV V
TB1/J5
23
+15V, 100mA max.
Voltage Control
Indicator
R1
19
R2
20
R3
21
R limit
10mA max.
Current Control
Indicator
10mA max.
Power Control
Indicator
R limit
R limit
10mA max.
R limit must be > 1kW
R1-R3=680W 1/4W
Figure 3.8 -- Remote Mode Indicators Interface
SL SERIES MANUAL
17
118006-001 REV V
Chapter 4
PRINCIPLES OF OPERATION
The SL Series of high voltage power supplies utilizes
sophisticated power conversion technology. A variety of
analog, digital and power conversion techniques are used
throughout. The intention of the Principles of Operation
is to introduce the basic function blocks that comprise the
SL power supply. For details on a specific circuit,
consult Spellman’s Engineering Department.
WARNING
The energy levels used and generated by the
power supply can be lethal! Do not attempt to
operate the power supply unless the user has a
sufficient knowledge of the dangers and hazards
of working with high voltage. Do not attempt to
approach or touch any internal or external
circuits or components that are connected or
have been connected to the power supply. Be
certain to discharge any stored energy that may
be present before and after the power supply is
used. Consult IEEE recommended practices for
safety in high voltage testing #510-1983.
See Table 4.1 for a list of the main assemblies found in a
typical SL power supply.

Due to the many variations within the SL Series,
drawing numbers may differ from unit to unit.
The SL power supply is basically an AC to DC power
converter. Within the power supply, conversions of AC
to DC then to high frequency AC, then to high voltage
DC take place. By reviewing further the sub-assemblies,
a basic understanding of the process can be gained.
4.2 Line Rectification
And Filtering
4.1 Chassis
The SL is a compact, high efficiency, high voltage power
supply. The power supply can supply up to 1200 watts of
DC power. (Output power capability may be higher or
lower depending upon the model ordered). Output
voltages of up to 130kV can be generated.
SL SERIES MANUAL
Basic single phase rectification provides the DC voltage
for the high frequency inverter.
18
118006-001 REV V
ASSEMBLY TITLE
ASSEMBLY DRAWING NO.
SL Chassis (10W-300W)
SL Chassis (600W-1200W)
Control / Power PWB (to 300W)
Control / Power PWB (600W-1200W)
High Voltage Assy (to 300W)
High Voltage Assy (600W-1200W)
Front Panel PWB
J5
TB1
403919-016
403917-001
403920-001
403918-001
404065-005
403911-001
404581-001
403935-TAB
403930-TAB
403931-TAB
403895-001
Table 4.1-List of Main Assemblies
In general, the following variations can be ordered:

100Vac  10%, 50 to 60Hz, single phase.

115Vac  10%, 50 to 60Hz, single phase.

200Vac  10%, 50 to 60Hz, single phase.

220Vac  10%, 50 to 60Hz, single phase.
SCHEMATIC DRAWING NO.
J5
TB1
440643-003
440530-001
440643-004
440617-001
440570-002
440528-001
440687-002
440538-001
440533-001
440534-001
440525-001
energized to short the NTC or resistor limiters. This DC
voltage is supplied to the high frequency inverter.
The DC rails are connected to the high frequency rail
capacitors. These capacitors are high frequency, low loss
type, which provides the energy storage for the high
frequency inverter.
4.3 Inverter
Other input voltages can be accommodated. If the user is
unsure of which input voltage option is supplied, check
the serial tag on the rear of the power supply or consult
Spellman’s Sales Department.
The inverter is a series resonant, series/parallel loaded
topology. A proprietary control scheme is used for
regulating the power generated from the inverter. The
switching devices are Mosfets up to 300W, and IGBT’s
for power levels above 300W. These devices provide
high frequency switching to control the resonant current
flow.
The typical resonant operating period is
approximately 10 Seconds. The gate control for the
switching devices is provided by the application circuitry
located on the CONTROL/POWER PWB.
The
CONTROL/POWER PWB also provides circuitry for
sensing shoot thru and overcurrent conditions in the
inverter.
Circuit protection is provided by a front panel circuit
breaker. The circuit breaker is a fast acting magnetic trip
type circuit breaker. The line input is connected directly
to the line side of the circuit breaker whereas the load side
is connected to the CONTROL/POWER PWB. The load
side of the breaker is also connected to a step-down type
line transformer. This transformer provides voltage for
housekeeping and control circuit power.
WARNING
4.4 High Voltage Transformer
LINE VOLTAGE IS PRESENT WHENEVER THE
POWER SUPPLY IS CONNECTED TO EXTERNAL
LINE VOLTAGES. BE SURE TO DISCONNECT
THE LINE CORD BEFORE OPENING THE UNIT.
ALLOW 5 MINUTES FOR INTERNAL
CAPACITANCE TO DISCHARGE BEFORE
REMOVING ANY COVER.
The output of the High Frequency Resonant Inverter is
connected to the primary of the High Voltage
Transformer. The High Voltage Transformer is a set up
type. Typical secondary voltages are in the range of 1kV
to 4.5kV depending upon the output voltage ratings.
When the circuit breaker is ON, voltage is applied to an
isolated diode rectifier bridge, which contains the rectifier
diodes used for line voltage rectification. The output of
this bridge rectifier is connected to a capacitor filter.
Capacitors are initially charged through NTC type or
resistive inrush limiters.
For 150W and higher configurations, approximately 3
seconds after the circuit breaker is turned on, a relay is
SL SERIES MANUAL
19
118006-001 REV V
An arc sense circuit provides sensing, quench and
indicator of arc conditions. Consult the operation manual
for a detailed description of the arc sense control.
4.5 High Voltage Assembly
The High Voltage Assembly will vary depending upon
the model ordered. The circuitry typically consists of a
full wave, full bridge, or full wave doubler for voltage
outputs in the range of 1kV to 8kV. The higher voltage
ranges utilize various parallel, series arrangements of a
full wave voltage doubler.
Current feedback from the high voltage rectifier is sent to
sense resistors located on the High Voltage Assembly.
Calibrated feedback is then sent to the applicable circuitry
on the Control/Power Board.
U12 and U13 circuits provide visual indication of the
control mode, which is in operation. These signals are
sent to the FRONT PANEL ASSEMBLY for front panel
status indication.
Output filtering is typically provided by an R-C type
filter. Voltage feedback for regulation and monitoring is
provided by a high bandwidth resistive/capacitive divider.
Current feedback for regulation and monitoring is
provided by a sense resistor connected at the low voltage
end of the High Voltage Rectifier/Multiplier Circuit.
The resonant control circuitry consists of a voltage to
frequency and a voltage to pulse width converter. U17
generates all frequency and pulse width control signals.
U16 provides specific control functions for the resonant
control.
4.6 Control/Power PWB
The majority of control circuits for power supply controls
are located on the CONTROL/POWER PWB. +15VDC, 15VDC, and +10VDC is generated on the
CONTROL/POWER PWB. High Voltage On/Off control
is accomplished by K3, and its associated circuitry.
Interlock control is provided by K4.
Power supply inhibit circuits are provided by U22 and
K3. System Fault control and Indication is provided by
U19, U20 and U21, and associated circuitry. Diagnostic
signals are latched and then sent to the FRONT PANEL
ASSEMBLY for status indication.
Voltage feedback from the high voltage divider is sent to
the control board via a mass terminated ribbon cable.
Gain adjustment is provided on the HV PWB. The KV
feedback signal is sent to the front panel DVM and to the
REAR PANEL TERMINAL BLOCK for remote
monitoring. K2 provides switching between feedback
and program signal for the front panel DVM’s. This
allows the user to preset the desired output before
energizing high voltage.
4.7 Front Panel Assembly
Front Panel controls, meters and status indications are
connected to the FRONT PANEL PWB. The FRONT
PANEL
PWB
interfaces
directly
to
the
CONTROL/POWER PWB.
4.8 Options
Due to the many variations of models and options
provided in the SL Series, details of actual circuits used
may differ slightly from the above descriptions. Consult
Spellman’s Engineering Department for questions
regarding the principles of operation for the SL Series.
Program voltages are typically ramped up to set level by a
slow start circuit.
SL SERIES MANUAL
20
118006-001 REV V
Chapter 5
OPTIONS
T
he options available for this power supply are
described in this section. Interface diagrams are
shown where required. Options are specified by
including the option code in the model number as
described in Section 1.5.
5.5 Extra Length Output
Cable--LL(ft)
Standard output cable is 10 feet of shielded high voltage
cable. Other lengths may be specified in multiples of 10
feet.
5.1 Adjustable
Overload Trip --AOL
5.6 Floating Ground--FG
The overload trip protection feature rapidly shuts down
the high voltage output when the current exceeds the limit
set by the current control dial on the front panel. A fast
acting circuit inhibits the generation of high voltage and
reverts the unit to POWER DOWN mode, illuminating
the OVER CURRENT indicator. When adjustable
overload trip is provided, it replaces the standard current
regulation feature.
The floating ground option allows isolation of the power
supply common from the chassis ground. TB2 located on
the rear panel provides connection to the power supply
common circuit and to the chassis ground. This signal
can be used for a variety of applications. A typical
application for FG is for connection of an external meter
or circuit into the FG signal point. This circuit can
monitor actual current flow at a low voltage level. See
Figure 5.1 for typical connection to the floating ground
terminal.
5.2 220Vac Single Phase
Input--220
NOTE: On standard units, TB2-1 and TB2-2 are
connected to the chassis grounded internally. Maximum
floating ground voltage is 15V. Typically, the total
leakage current of the floating terminal to the chassis
terminal is less that 1A. It is important to realize there
are two separate components to this leakage current. The
first component is leakage current caused by the coupling
of the 60Hz line magnetics to the power supply circuitry.
This component can be measured when the power supply
is ON and in the HIGH VOLTAGE OFF mode. The
second component is the leakage current caused by the
coupling of the HVDC circuits to the chassis. The
component can be measured by first recording the leakage
current in the HV OFF mode, and then recording the
leakage at the desired HV setting. The difference
between the two values is the HVDC leakage current.
SL Series power supplies with the 220Vac input option
will operate from an input voltage of 220Vac RMS
10%, 50 to 60Hz, single phase.
5.3 No Slow Start--NSS
The no slow start option causes the output voltage of the
power supply to rise (within 50 msec) to the rated voltage
upon depressing the HIGH VOLTAGE ON switch.
5.4 Non-Standard Slow
Start--SS(x)
The non-standard slow start option allows the gradual rise
time of the output voltage to be different from the
standard of six seconds. To order the option place the
time desired in seconds after the suffix letter, i.e. SS (10)
denotes a 10 second rise time.
SL SERIES MANUAL
21
118006-001 REV V
5.7 Floating Ground
Low Leakage--FGLL
5.9 Arc Trip Option--AT
When this option is ordered, the Arc Count circuit is set
so the unit trips to Standby after 1 count. One of the
applications for this option is for sensing a material
breakdown under an applied high voltage.
The Low Leakage floating ground option also provides
isolation of the power supply common from the chassis
ground with a maximum leakage current of 10nA. The
typical connections are the same as for the regular
Floating Ground Option described in Section 5.6. As
stated above in the FG Option description, the FGLL
leakage current is also comprised of two components.
The 60Hz component is the same as the FG option
(<1A). However, in the FGLL option the HVDC
leakage current is less than 10 nanoAmps.
5.10 Reversible
Polarity Option--PN
5.10.1 Models from 1 kV to 8kV
For units from 1 kV to 8kV, the polarity may be reversed
in the field by following the procedures shown in Figure
5.3.
IMPORTANT
5.10.2 Models From 10Kv To 130Kv
The power supply common must be connected
to the chassis ground through a low impedance
circuit. The power supply common is clamped
to the chassis ground using a power zener
diode. This diode is not intended to clamp under
continuous operation. On higher current units
the power dissipation within the zener diode can
be excessive if allowed to clamp.
When this option is ordered, a second multiplier is
provided to permit the user to replace the existing
multiplier with another of reverse polarity. See Figure
5.4 for a step by step procedure.
5.11 Instant On--IO
When the Instant On Option is ordered, the High Voltage
is enabled as soon as line voltage is applied when the
circuit breaker is in the ON position. (See Figure 5.7)
5.8 Adjustable Power
Trip/Constant Power Control
To enable Instant On, keep the jumper between TB1-14
and TB1-15 attached. Connect an additional jumper from
TB1-15 to TB1-16 as shown in Figure 5.7.
(TB1 only)--APT/CPC
CAUTION
The power control options allow monitoring and control
of the power supply output power. The APT option
allows the user to remotely adjust the power limit for the
power supply. If the power limit is exceeded, the unit
will shut down with an OVERPOWER fault. The CPC
option allows power regulation via an internal preset
potentiometer, or a remote program source. When the
unit is in power regulation, the POWER CONTROL
status indicator will be illuminated. See Figure 5.2 for
remote interface.
SL SERIES MANUAL
The Power Supply will generate programmed
High Voltage whenever the circuit breaker is in
the ON position, and line voltage is applied.
22
118006-001 REV V
5.12 Bipolar Master/Slave
Option--MS
The Bipolar Master/Slave option allows two supplies of
the same voltage rating but opposite polarities to
functions as a single tracking bipolar power supply. The
positive supply is configured as the Master, the negative
supply is configured as the Slave. This is accomplished
by connecting the Voltage Test Point of the positive
(Master) unit to the Voltage programming of the negative
(Slave) unit. See Figure 5-8. The Master’s voltage
programming signal will provide control of both power
supplies from zero to rated output voltage. The negative
polarity will track the positive polarity within 1% from
10% to full rated output. Performance specifications are
governed by individual unit characteristics. The two units
must be connected independently to their respective loads
and ground.

Arc (Shutdown): Arc sensing circuit has shut down
the supply due to excessive arcing.

Overpower: The power supply has exceeded the
internally set power limit level, if such circuitry is
installed.
With the installation of the EFR option for TB1, if any of
these faults occur, a relay will be activated to provide a
remote indication that the power supply has reverted to
the “power down” mode. The common, normally open
and normally closed set of contacts are provided. Relay
contacts are rated at 1A at 30Vdc or 0.5A at 48Vac.
Connections on the rear panel Terminal Block (TB1) can
be made as follows:
5.13 External Fault Relay Option
EFR
TB1-23
(J5-12)
Relay Common
TB1-24
(J5-NA)
Normally Closed
TB1-25
(J5-13)
Normally Open
Resetting the front panel and EFR relay is accomplished
by depressing the green front panel HV OFF push-button
switch, which reverts the power supply back to the
“standby” mode. Removal and reapplication of the AC
line input voltage will also reset any fault.
The external fault relay option provides a set of customer
accessible relay contacts that are controlled by the fault
status circuitry of the applicable SL Series power supply.
A standard SL power supply will revert to the “power
down” mode with a visual front panel indication if any of
the following fault conditions occur:
The circuitry and components required for the EFR
option are installed at the factory when this option is
ordered.

Overvoltage: Greater than 110% of maximum
output voltage was produced by the power supply.
5.14 Custom Designed Models-X#

Overcurrent: Greater than 104% of maximum
output current was produced by the power supply or
the AOL circuitry was activated.
Units built to customer specification are assigned an X
number by the factory. If this unit is an X model, a
specification control sheet is added at the end of the test
of this instruction manual.

Overtemperature: Excessive temperature has been
sensed within the chassis.

Regulation Error: Lack of required output power to
maintain regulation
SL SERIES MANUAL
Spellman welcomes the opportunity to customize units to
fit your requirements or to develop new products for your
applications. Contact the Spellman Sales Department
with your needs.
23
118006-001 REV V
Possible FG termination circuits
To internal
high voltage
return circuits.
1
CR1
Pin 2 internally
connected to
power supply
chassis.
FG option
units are
shipped with
external
jumper.
M
2
TB2
* IMPORTANT: Power dissipation
in CR1 should not exceed 1/2W.
This can be accomplished by
keeping TB3-1 and TB3-2
voltage below Zener voltage.
CR1 is for safety and transient
protection only, and is not
designed for continuous clamping.
Zener voltage is 18V standard.
Up to 50V is available.
Consult factory.
Figure 5.1 -- Floating Ground Interface Circuit
TB1
1
2
Remove internal
jumper, JP1 ON
Control/Pwr PWB
for remote
Programing. (Jumper
connects internal,
pot, factory set at
103%of max power).
3
4
5
6
12
13
M
+
Remote
Power
Monitor
0-10V
=0-100%
power
output
Zout=
4.99k ohm0.1%
Z in =10Mohm
V
Remote
Power
Program
+
20K ohm
min.
Remote Power
Programming
potentiometer
7
Figure 5.2 -- Adjustable Power Remote Interface TB1 Only
SL SERIES MANUAL
24
118006-001 REV V
TABLE 1
SW1 AND SW2 SWITCH SETTINGS
POLARITY SW1-1
SW1-2
SW1-3
SW1-4
SW1-5
SW1-6
SW2-1
SW2-2
SW2-3
SW2-4
SW2-5
SW2-6
POSITIVE CLOSED CLOSED CLOSED CLOSED CLOSED CLOSED OPEN
OPEN
OPEN
OPEN
OPEN
OPEN
NEGATIVE OPEN
OPEN
OPEN
OPEN
OPEN
OPEN CLOSED CLOSED CLOSED CLOSED CLOSED CLOSED
5
1
TURN UNIT OFF, UNPLUG LINE CORD FROM AC OUTLET AND
WAIT FOR 5 MINUTES BEFORE PROCEEDING TO CHANGE THE
POLARITY OF UNIT.
2
REMOVE COVER BY UNSCREWING AND REMOVING 11 SCREWS
THAT MOUNT COVER TO CHASSIS AND FRONT PANEL.
3
REMOVE 4 SETS OF HARDWARE THAT HOLD THE LEXAN COVER
TO THE HIGH VOLTAGE BOARD, AND REMOVE COVER.
4
SWAP BLACK AND WHITE WIRES BETWEEN J4 AND J5 AS FOLLOWS:
FOR POSITIVE POLARITY:
BLACK WIRE ON J4 AND WHITE WIRE ON J5.
FOR NEGATIVE POLARITY:
WHITE WIRE ON J4 AND BLACK WIRE ON J5.
5
SET SW1 AND SW2 DIP SWITCHES ACCORDING TO TABLE 1
6
CHANGE POSITION OF JP4 JUMPERS ON FRONT PANEL BOARD
TO MATCH POLARITY OF UNIT, i.e 2 JUMPERS MUST BE ON "N"
POSITIONS FOR NEGATIVE UNITS AND ON "P" POSITIONS FOR
POSITIVE UNITS.
7
REINSTALL LEXAN COVER AND RELATED HARDWARE.
REINSTALL POWER SUPPLY'S COVER AND ALL HARDWARE BEFORE
TURNING UNIT ON.
HIGH VOLTAGE BOARD
3
4
NOTE: POWER SUPPLIES THAT UTILIZE CONTROL BOARD
P/N 450050-XXX DO NOT REQUIRE STEP 5.
A
A
10-300 Watt
1kV-8kV chassis
6
POSITIVE CONFIGURATION
SHOWN
PARTIAL VIEW A-A
NOTE: JP4 NOT USED ON
SUPPLIES EQUIPPED WITH BFP OPTION
Figure 5.3-Polarity Reversal Procedure
10W to 300W, 1kV to 8kV Chassis
5
4
3
T U R N U N IT O F F , U N P L U G L IN E C O R D F R O M A C O U T L E T A N D
W A IT F O R 5 M IN U T E S B E F O R E P R O C E E D IN G T O C H A N G E T H E
P O L A R IT Y O F U N IT .
2
JB 2
JB 1
5
H IG H V O L T A G E
M U L T IP L IE R
6
A
A
1
R E M O V E C O V E R B Y U N S C R E W IN G A N D R E M O V IN G 1 1 S C R E W S
T H A T M O U N T C O V E R T O C H A S S IS A N D F R O N T P A N E L .
2
U N P L U G H IG H V O L T A G E L E A D S F R O M A S S E M B L Y .
3
U N P L U G C A B L E F R O M J B 1 A N D R E M O V E C A B L E S H IE L D
FRO M FASTO N TAB O N BO ARD .
4
U N PLU G C O N N EC TO R FR O M JB 2.
5
REM O VE 2 SC REW S TH AT HO LD TH E PO LYETH YLEN E ENC LO SUR E
A N D 2 S C R E W S T H A T M O U N T T H E B O A R D T O T H E C H A S S IS
6
C A R E F U L L Y T IL T U P A N D S L ID E O U T M U L T IP L IE R .
7
IN S T A L L N E W M U L T IP L IE R B Y F O L L O W IN G S T E P S 6 T H R U 2 IN
REVERSE.
8
C H A N G E P O S IT IO N O F J P 4 J U M P E R S O N F R O N T P A N E L B O A R D
T O M A T C H P O L A R IT Y O F U N IT , i.e 2 J U M P E R S M U S T B E O N "N "
P O S IT IO N S F O R N E G A T IV E U N IT S A N D O N "P " P O S IT IO N S F O R
P O S IT IV E U N IT S .
9
IN S T A L L C O V E R A N D A L L H A R D W A R E B A C K B E F O R E T U R N IN G
U N IT O N .
1 0 -3 0 0 W a tt
1 0 k V -1 3 0 k V c h a s s is
8
P O S IT IV E C O N F IG U R A T IO N
SHOW N
P A R T IA L V IE W A -A
N O TE: JP4 N O T U SED O N
S U P P L IE S E Q U IP P E D W IT H B F P O P T IO N
F ig u re 5 .4 -P o la rity R e v e rs a l P ro c e d u re
1 0 W to 3 0 0 W , 1 0 k V to 1 3 0 k V C h a s s is
SL SERIES MANUAL
25
118006-001 REV V
E1 TB1
J4
TURN UNIT OFF, UNPLUG LINE CORD FROM AC OUTLET AND
WAIT FOR 5 MINUTES BEFORE PROCEEDING TO CHANGE THE
HIGH VOLTAGE MULTIPLIER.
J1
CR4
JP12
JP13
J3
J2
JB1
C2E1
C2E1
L2
J3
JB2
E2
ASSY 404230REV.A
Q3
L1
C1
J1
J4
1 REMOVE COVER BY UNSCREWING AND REMOVING 12 SCREWS
THAT MOUNT COVER TO CHASSIS AND FRONT PANEL.
E2
Q2
J2
C1
R26
G1 E1
2
E9
E2D G2
G1 E1
E14 E13
E11
E2D G2
E30 E28
E20 E27
2 REMOVE 4 SETS OF HARDWARE THAT HOLD THE LEXAN COVER
TO THE HIGH VOLTAGE BOARD, AND REMOVE COVER.
3
JB5
3 SWAP BLACK AND WHITE WIRES BETWEEN J4 AND J5 AS FOLLOWS:
FOR POSITIVE POLARITY:
BLACK WIRE ON J4 AND WHITE WIRE ON J5.
FOR NEGATIVE POLARITY:
WHITE WIRE ON J4 AND BLACK WIRE ON J5.
DANGER
HIGH VOLTAGE
OUTPUT VOLTAGE:
OUTPUT POWER:
OUTPUT CURRENT:
POLARITY:
SPECIAL FEATURES:
2
PART NO.:
MODEL:
JB7
SPELLMAN
E38
HIGH VOLTAGE ELECTRONICS CORP
PLAINVIEW, NY 11803
MADE IN USA
JB8
E39
220V
JB9
115V
E37
115V
T1
1
E36
4 REINSTALL LEXAN COVER AND RELATED HARDWARE.
REINSTALL POWER SUPPLY'S COVER AND ALL HARDWARE BEFORE
TURNING UNIT ON.
E2
JB2
4
JB2
LINE
1
LOAD
JB3
600 to 1200 Watt
1kV to 8kV chassis
Figure 5.5 -- Polarity Reversal Procedures
600W to 1200W, 1kV to 8kV Chassis
5
6
4
3
TURN UNIT OFF, UNPLUG LINE CORD FROM AC OUTLET AND
WAIT FOR 5 MINUTES BEFORE PROCEEDING TO CHANGE THE
HIGH VOLTAGE MULTIPLIER.
2 REMOVE COVER BY UNSCREWING AND REMOVING 12 SCREWS
THAT MOUNT COVER TO CHASSIS AND FRONT PANEL.
1
1
TB1
J4
E3
J1
JP12
JP13
J3
J2
REV.
ASSY
A 404129-001
JB1
E4
JB2
1
C2E1
1
4
JB3
J4
E2
C2E1
L2
REV. A
5
ASSY 403935SL 600W-1200W
CONTROL/POWER BD
S/S REV. A
E2
E2
Q2
Q3
L1
C1
G1 E1
E9
C1
E2D G2
G1 E1
E14 E13
E11
E2D G2
3
UNPLUG HIGH VOLTAGE LEADS FROM ASSEMBLY.
4
UNPLUG CABLE FROM JB1 AND REMOVE CABLE SHIELD
FROM FASTON TAB ON BOARD.
5
UNPLUG CONNECTOR FROM JB2.
6
REMOVE 2 SCREWS THAT HOLD THE POLYETHYLENE
ENCLOSURE AND THE BOARD TO THE CHASSIS
7
CAREFULLY TILT UP AND SLIDE OUT MULTIPLIER.
8
INSTALL NEW MULTIPLIER BY FOLLOWING STEPS 6 THRU 2 IN
REVERSE.
9
INSTALL COVER AND ALL HARDWARE BACK BEFORE TURNING
UNIT ON.
E30 E28
E20 E27
JB1
HIGH VOLTAGE
MULTIPLIER
JB5
7
E38
JB6
E39
220V
JB7
115V
E37
T1
115V
1
E36
E2
JB2
JB2
4
1
LINE
LOAD
JB3
600 to 1200 Watts
10kV to 120kV chassis
Figure 5.6 -- Polarity Reversal Procedure
600W to1200W, 10kV to 120kV Chassis
SL SERIES MANUAL
26
118006-001 REV V
TB1/J5
14
Existing jumper
15
Jumper TB1 15 to 16
for Instant ON option
Figure 5.7 -- Instant ON
16
17
POSITIVE (MASTER)
SUPPLY
P.S.
Common
kV Test
Point OUT
NEGATIVE (SLAVE)
SUPPLY
TB1/J5
TB1/J5
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
P.S.
Common
Remote Voltage
Program IN
* REMOVE
JUMPER
LINKING
10-11
INSTALLATION NOTE
Keep Interconnecting Wires as Short as possible.
Use of Twisted Wire Pair or Shielded/Coaxial wire is recommended.
Figure 5.8 -- Bipolar/ Slave Option
SL SERIES MANUAL
27
118006-001 REV V
Chapter 6
MAINTENANCE
T
his section describes periodic
performance testing procedures.
servicing
and
6.2 Performance Test
WARNING
WARNING
HIGH VOLTAGE IS DANGEROUS.
THIS POWER SUPPLY GENERATES VOLTAGES
THAT ARE DANGEROUS AND MAY BE FATAL .
OBSERVE EXTREME CAUTION WHEN
WORKING WITH HIGH VOLTAGE.
ONLY QUALIFIED PERSONNEL SHOULD
PERFORM THESE TESTS.
High voltage test procedures are described in Bulletin
STP-783, Standard Test Procedures for High Voltage
Power Supplies. Copies can be obtained from the
Spellman Customer Service Department. Test equipment,
including an oscilloscope, a high impedance voltmeter,
and a high voltage divider such as the Spellman HVD100 or HVD-200, is needed for performance tests. All
test components must be rated for operating voltage.
6.1 Periodic Servicing
Approximately once a year (more often in high dust
environments), disconnect the power to the unit and
remove the top cover. Use compressed air to blow dust
out of the inside of the unit. Avoid touching or handling
the high voltage assembly. Be sure that the fan (600W1200W units only) is not obstructed and spins freely. The
fan has sealed bearings and does not need lubrication. Be
sure to replace the top cover before operating for proper
cooling.
SL SERIES MANUAL
6.3 High Voltage Dividers
High voltage dividers for precise measurements of output
voltage with an accuracy up to 0.1% are available. An
HVD-100 is used for voltages up to 100KV. An HVD200 measures up to 200KV. The Spellman divider is
designed for use with differential voltmeters or high
impedance digital voltmeters. The high input impedance
is ideal for measuring high voltage low current sources,
which would be overloaded by traditional lower
impedance dividers.
28
118006-001 REV V
Chapter 7
REPLACEMENT PARTS
7.1 Replacement Parts
7.2 Correspondence and
Ordering Spare Parts
Contact the Spellman Customer Service Department for
parts lists for specific models.
Each power supply has an identification label on the rear
of the chassis that bears its model and serial number.
Parts and subassemblies for Spellman’s high voltage
power supplies are available. It is recommended that only
qualified personnel perform the repairs. High voltage is
dangerous; even minor mistakes in repairs can have
serious consequences.
When requesting engineering or applications information,
please state the model and serial number of the power
supply. If specific components or circuit sections are
involved in the inquiry, it is helpful to indicate the
component symbol number(s) shown on the applicable
schematic diagram.
When requesting parts please give the model number and
serial number of the power supply.
When ordering spare parts, please specify the part
number, the component function, and the model and serial
number of the unit.
SL SERIES MANUAL
29
118006-001 REV V
Chapter 8
FACTORY SERVICE
8.3
8.1 Warranty Repairs
During the Warranty period, Spellman will repair all units
free of charge. The Warranty is void if the unit is worked
on by other than Spellman personnel. See the Warranty in
the rear of this manual for more information. Follow the
return procedures described in Section 8.2. The customer
shall pay for shipping to and from Spellman.
Ordering Options and
Modifications
Many of the options listed in Chapter 5 can be retrofitted
into Spellman’s power supplies by our factory. For prices
and arrangements, contact the Spellman Sales Department.
8.4 Shipping Instructions
All power supplies returned to Spellman must be sent
shipping prepaid. Pack the units carefully and securely in a
suitable container, preferably in the original container, if
available. The power supply should be surrounded by at
least four inches of shock absorbing material. Please return
all associated materials, i.e. high voltage output cables,
interconnection cables, etc., so that we can examine and test
the entire system.
8.2 Factory Service Procedures
Spellman has a well-equipped factory repair department. If
a unit is returned to the factory for calibration or repair, a
detailed description of the specific problem should be
attached.
For all units returned for repair, please obtain an
authorization to ship from the Customer Service
Department, either by phone or mail prior to shipping.
When you call, please state the model and serial numbers,
which are on the plate on the rear of the power supply, and
the purchase order number for the repair. A Return
Material Authorization Code Number (RMA Number) is
needed for all returns. This RMA Number should be
marked clearly on the outside of the shipping container.
Packages received without an RMA Number will be
returned to the customer. The Customer shall pay for
shipping to and from Spellman.
All correspondence and phone calls should be directed to:
Spellman High Voltage Electronics Corp.
475 Wireless Boulevard
Hauppauge, New York 11788
TEL: (631) 630-3000 FAX: (631) 435-1620
E-Mail: sales@Spellmanhv.com
A preliminary estimate for repairs will be given by phone
by Customer Service. A purchase order for this amount is
requested upon issuance of the RMA Number. A more
detailed estimate will be made when the power supply is
received at the Spellman Repair Center. In the event that
repair work is extensive, Spellman will call to seek
additional authorization from your company before
completing the repairs.
SL SERIES MANUAL
30
118006-001 REV V
To obtain information on Spellman’s product warranty please visit our website at:
http://www.spellmanhv.com/en/About/Warranty.aspx